I had the pleasure to meet Dan yesterday.If you recall the spring guild in his piston for his M34 came loose.
We had a really good chat,shot a few air guns and I had set up a little show and tell in the garage for Dan to take a look at some of my air rifles and pistols.
He tested the FWB 300S and the Diana P5 Magnum pistol.Unfortunately my M48 and Disco are at Leapers for R&E Dept.The 48 was used to develop the new droop mounts especially designed for Diana rifles and the Disco is going to a photo shoot for some Leapers advertisements,and Crosman wants to take a look at it,for what reason I have no idea.
Anyway my 5 minute welding job turned into a 3 hour BS session,two retired guys chatting about air guns,likes and dislikes and life in general.I want to thank Dan for the .22 cal.pellets he left me with,a full tin of 18.20gr.Beeman Crow Magnum's and a full tin of 21.10gr.Kodiak Extra Heavy's,both the M48 and Disco love those heavy pellets.
I mentioned to Dan maybe in the spring/summer a few of us local air gunners can get together for a little plinking,target shooting and I am sure another chat session will follow.
It was my pleasure to meet you Danny!!
BBGun Bob
SE Mich.
My Motto:
I'll weld any thing except!!
#1 A wise crack.
#2 The break of day.
#3 A broken heart.
where I was test firing my new-and-improved 34. First off, I have say that Bob was a very gracious host, and a big thank you for welding the piston head and making it better than new. When done, the piston rod was perfectly centered and will never come loose again.
I replaced the original scuffed seal w/ a JM Apex seal which compleatly stopped the dieseling. I also replaced the lumpy main spring w/ a JM spring kit & lubes which really smoothed the gun out. I also installed JM old school buttons on the piston and clipped the sear spring in the trigger assembly. The gun just goes thunk w/ less recoil. It also seems quieter than before, which is a good thing. I can't tell you about fps/fpe because I don't have a chrony.
I took the gun from my 70* basement out into my 32* garage for the first shots with mixed result. A few loose groups, a couple of short strings and a few very small single holes w/ 5-pellets in them. I'm hoping it's just settling in. At this point I'm very pleased with the gun.
I really enjoyed the visit, Bob. You have a really nice set-up for shooting in the back yard and I had a good time shooting your guns. You better keep an eye on that Diana pistol. Bob also has a wild Mourning Dove for a pet. It just flies loose in the house. It's even paper trained. Very cool. We'll have to do it again some time.
A part that will last forever so you don't need no stinkin warranty!
Way to go BBgun!
I saw the original post and was skeptical. That rod connection is buried down in the piston with just a small slot for access. How'd you get at it? Is there some other way?
The rod is fastened to the end where the seal goes.Kinda like a washer at the piston seal end this is then crimped and flash welded to the piston which is made like a hollow tube until this is made into one assembly.
Dan's break was where the two parts mate together by the crimping and flash welding process.
I just tig welded this joint into one piece,in other words the piston is now a solid piece of steel and will never fail again.
BBGun Bob
Retired Tool and Die Welder
Air Guns Create Questions????
Together we can write the answers!!
Bob I have the same problem as Dan my piston has a loose spring guide and head. Is this a common problem with 34 pistons? I am wondering if welding is better than replacing or replacing and rewelding? Thanks
